NAME
snmpbulkwalk - retrieve a subtree of management values
using SNMP GETBULK requests
SYNOPSIS
snmpbulkwalk [APPLICATION OPTIONS] [COMMON
OPTIONS] [OID]
DESCRIPTION
snmpbulkwalk is an SNMP application that
uses SNMP GETBULK requests to query a network entity efficiently
for a tree of information.
An object identifier (OID) may be given on the command line.
This OID specifies which portion of the object identifier space
will be searched using GETBULK requests. All variables in the
subtree below the given OID are queried and their values presented
to the user. Each variable name is given in the format specified in
.
If no OID argument is present, snmpbulkwalk will search
MIB-2.
If the network entity has an error processing the request
packet, an error packet will be returned and a message will be
shown, helping to pinpoint why the request was malformed.
If the tree search causes attempts to search beyond the end of
the MIB, the message "End of MIB" will be displayed.
OPTIONS
- -Cc
- Do not check whether the returned OIDs are increasing. Some
agents (LaserJets are an example) return OIDs out of order, but can
complete the walk anyway. Other agents return OIDs that are out of
order and can cause snmpbulkwalk to loop indefinitely. By
default, snmpbulkwalk tries to detect this behavior and
warns you when it hits an agent acting illegally. Use -Cc to
turn off this behaviour.
- -Ci
- Include the given OID in the search range. Normally
snmpbulkwalk uses GETBULK requests starting with the OID you
specified and returns all results in the MIB tree after that OID.
Sometimes, you may wish to include the OID specified on the command
line in the printed results if it is a valid OID in the tree
itself. This option lets you do this.
- -Cn<NUM>
- Set the non-repeaters field in the GETBULK PDUs. This
specifies the number of supplied variables that should not be
iterated over. The default is 0.
- -Cp
- Upon completion of the walk, print the number of variables
found.
- -Cr<NUM>
- Set the max-repetitions field in the GETBULK PDUs. This
specifies the maximum number of iterations over the repeating
variables. The default is 10.
In addition to these options, snmpbulkwalk takes the
common options described in the snmpcmd(1)
manual page.
EXAMPLE
The command:
snmpbulkwalk -v2c -Os -c public zeus system
will retrieve all of the variables under system:
sysDescr.0 = STRING: "SunOS zeus.net.cmu.edu 4.1.3_U1 1
sun4m"
sysObjectID.0 = OID: enterprises.hp.nm.hpsystem.10.1.1
sysUpTime.0 = Timeticks: (155274552) 17 days, 23:19:05
sysContact.0 = STRING: ""
sysName.0 = STRING: "zeus.net.cmu.edu"
sysLocation.0 = STRING: ""
sysServices.0 = INTEGER: 72
In contrast to snmpwalk, this information will typically
be gathered in a single transaction with the agent, rather than one
transaction per variable found. snmpbulkwalk is thus more
efficient in terms of network utilisation, which may be especially
important when retrieving large tables.
NOTE
As the name implies, snmpbulkwalk utilizes the
SNMP GETBULK message, which is not available in SNMP v1.
SEE ALSO
snmpcmd(1),
variables(5).